状态机近年原文.doc

StateMachineWorkflowActivity

DynamicUpdateCondition属性

StateActivity控件

StateActivity

SetState

State

StateInitialization

StateFinalization

HandleExternalEvent

宿主中操作状态

说明

从引擎中得到状态机实例

构造函数

Dim状态机实例AsStateMachineWorkflowInstance

状态机实例=NewStateMachineWorkflowInstance(Me.引擎,Me.当前操作的实例.InstanceId)

得到工作流的状态列表

States集合

下拉菜单.Items.Clear()

Dim状态集合AsReadOnlyCollection(OfStateActivity)=状态机实例.States

ForEachtempAsStateActivityIn状态集合

下拉菜单.Items.Add(temp.Name)

Next

改变状态

SetState方法

Dim状态名AsString=下拉菜单.SelectedItem.ToString()

状态机实例.SetState(状态名)

显示当前状态

CurrentStateName属性

状态机实例.CurrentStateName

StateMachineWorkflowInstance类

在宿主中动态添加状态点

WorkflowInstance实例=this.引擎.GetWorkflow(this.得到列表框中选择项的实例编号());

Activity根=实例.GetWorkflowDefinition();

WorkflowChanges修改对象=newWorkflowChanges(根);

//CreateanewStateactivitytotheworkflow

StateActivity新状态对象=newStateActivity();

新状态对象.Name=wxwinter;

EventDrivenActivityeventDrivenDelay容器=newEventDrivenActivity();

eventDrivenDelay容器.Name=DelayOrderEvent;

新状态对象.Activities.Add(eventDrivenDelay容器);

DelayActivity延时对象=newDelayActivity();

延时对象.Name=延时对象;

延时对象.TimeoutDuration=newTimeSpan(0,0,5);

eventDrivenDelay容器.Activities.Add(延时对象);

SetStateActivity设置状态对象=newSetStateActivity();

设置状态对象.TargetStateName=OrderOpenState;

eventDrivenDelay容器.Activities.Add(设置状态对象);

修改对象.TransientWorkflow.Activities.Add(新状态对象);

实例.ApplyWorkflowChanges(修改对象);